Our client has a one site that is running Umbraco v6.0.2 (Assembly version: 1.0.4811.18151)

The site is hosted elsewhere at present and they are wanting to move it across to our servers. I have few questions:

1.0 Will we need to install Umbraco prior to migration to our servers. 2.0 what will we need on our server to help with the migration. 3.0 when the migration has taken place can we upgrade to version 7 from their existing version. 4.0 can the umbraco platform sit ona shared server or will it have to be a dedicated server